[plugins-ici-cloning-instrumentation] new GCC plugin developements

[Joern Rennecke]

Quoting Grigori Fursin <grigori.fursin@inria.fr>:

>
> Ok, that's fine ...
>
> By the way, the ICI itself should not touch too much of the GCC code -
> it's an API on top of current plugin API. After resolving the issue
> with the pass names that is necessary for ICI to work properly,
> could you actually please check what will be all the necessary current
> GCC modifications to add ICI ... If it really modifies some critical
> parts, we can leave it for the next version then ...

I think things like sticking -export-dynamic into make files rules are
a portability showstopper.
There should be an autoconf test to check if the option is available.